Air-pump.



' Patented Sept. 9, |9u:z.-

E. wALTHEn.

AIR PUMP. (Applicaticn filed Jan. 21, 1902.)

(No Model.)

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No. 708,944. Patented Sept. 9,1902.

E. wALTni-zn. AIR PUMP.

(Application filed Jan. 21, 1902.)

(No Modal.) 2 Sheets-Sheet 2.

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NITED STATES ATENT lemon.

EDWARD WALTHER, OF WASHINGTON, IOWA.

AIR-PUMP.

SPECIFICATION forming part of Letters Patent No. 708,944, dated September 9, 1902.

Application filed January 21, 1902. Serial No. 90,644. (No model.)

To LtZZ whom, it may concern: 7

Be it known that I, EDWARD WALTHER, a citizen of the United States, residing at ashington, in the county of Washington and State of Iowa, have invented new and useful Improvements in Air-Pumps, of which the following is a specification.

My invention relates to air-pumps; and the object of the same is to construct an automatic pump for use in supplying air to carburetors for liquid-fuel lamps or heaters. The simple and novel construction by which this is accomplished is fully described in this specification and claimed, and illustrated in the accompanying drawings, forming a part thereof, in which- Figure 1 is a front elevation of my device. Fig. 2 is a vertical section of the same. Fig. 3 is a detail of the cam-levers, Fig. 4 is a detail longitudinal section of the water-valve. Fig. 5 is a detail view of elbow-leveran guides. 5

Like characters of reference designatelik parts in the different views of the drawings.

The letterAdesignates apum pin g-bell, and B its tub, which pumping-bell is designed to force air into a bell O, mounted in a tub D. Both tubs are kept partially full of water. The bells A and C communicate by way of a horizontal pipe 1, having two vertical branches 2 and 3 extending up into the bells A and (3, respectively. Check-valves 4 are mounted in casings connected in the pipe 1 and serve to prevent the return of air through thepipe. A pipe 5 extends upinto the bell Oand also communicates with a carburetor. The bell A is operated by water-pressure to force air into the hell 0, and for that pur-l pose a vertical motor-barrel 6 is mounted within the bell A and connected to a pipe 7, passing through the bottom of the tub B and connected to a valve 8. A piston 9 is slidingly mounted in the barrel and provided with a piston-rod 10, oppositely attached to the top of the bell A. The area of the piston 9 is quite considerable in orderto enable the bell to be raised easily by a moderate pressure in the barrel'6. The valve 8 is connected to a supply pipe or Water-main 11, communicating with a source (not shown) of water ata considerable elevation or under pressure. Au outlet-pipe 12 is also connected to the valve (Not shown.)

'spectively. nected by means of a chain 27 to a rigid hori- 8. The valve 8 is designed to regulate the admission of water from the main 11 to the pipe 7 and barrel 6 and has a casing 13, connected at one end to the pipe 12 and above and below to the pipes 7 and 11, respectively. A stem 14 is slidingly mounted in the casing 13 and is supported by a stuffing-box 15 and an elastic partition 16, held by two abutting sections 13 and 13" of the casing, secured together by a nut 17. The stem 14 is formed in two sections-a hollow section 14 and a solid section 14*. Mounted on the free end of the solid section 14 is a ball-valve 18, constructed when seated to cut oif the flow of water through the outlet-pipe 12. The hollow section 14 is perforated at 19 and 20. The perforations 20 are so located that when the valve 18 is seated they will be on the opposite side of the partition 16 from the perforations 20, and when the valve 18 is unseated they will be in the same side thereof. By this arrangement water is free to flow from the pipe 11 to the pipe 7 when the valve 18 is seated, thereby raising the bell A, but will be cut off when it is unseated. Water is free to flow from the pipe 7 and through the pipe 12 when the valve 18 is unseated, thereby permitting the descent of the bell A. To intermittently 0perate the valve to operate the bell, as above set forth, a lever 21 is attached to the outer end of the valve-stem 14 and extends up and is fulcrumed on a pin 21, seated in the tub B. A frame 22 is rigidly secured to the tub B and supports two levers 23 and 24, designed to operate the lever 21. The lever 23 bears a weight 23 on its long arm and a cam 23 on its short arm, while the lever 24 bears a similarly-placed weight and cam 24 and 24", re- To raise the lever 23, it is conzontal arm 28, carried by the bell A. This arm 28 supports two downwardly-extending pusher-rods-viz.,along pusher 29 andashort pusher 30, having lugs 30 and 30 thereon. The pusher 29 is located to engage a rigid trigger-arm 31, carried by the cam 24, as the bell A descends, thereby depressing the short cam-bearing arm, but raising the long weighted arm. To retain the cams 23 and 24 in their depressed positions, a sliding latch 32 is provided, which is mounted in guides 32 and engaged by the short arm 33" of a bellweight 24.

crank lever 33, fulcrumed on the casing and having a long arm 33 located in position to be alternately engaged by the lugs 30 and 30 on the pusher 30 as the bell A goes down and up. By this arrangement the latch is slid to the right when the bell descends and engages a stud 24, seated in the long arm of the lever 24. As the bell A ascends the latch 32 is displaced to the left and the lever 24 released, when it will be carried down by the Simultaneously with the release of the lever 24 the latch 32 will engage a stud 23, seated in the lever 23 and hold the weighted arm thereof in its elevated position.

But one more part of my device remains to be described and that is a cut-off operated by the bell C to stop the pump. This cut-off comprises a valve 35, located in the pipe 1 and operated by a weighted arm 36, connected by a chain 37 to the hell 0.

The operation of my pump can now be described. Suppose the initial position of the apparatus to be that shown in Fig. 1. The stem 14 of the valve Sis then pushed in, the escape of water is shut off, the bell A is ascending, and the lever 24 is held by the latch 32. This rising of the bell A will pull the chain 27 taut and raise the long weighted arm of the lever 23 up to its elevated position. When the bell A has almost reached its maximum height, the lug 3O will be raised up into engagement with the long arm 33 of the bell-crank lever 30, raising it and thereby sliding the latch 32 to the left, releasing the lever 24 and engaging the lever 23. The weighted arm of the lever 24 will drop, thereby bringing the cam 24 into engagement with the lug 21 throwing the lever 21., operating the valve 8, shutting off the supplyof water, and opening the discharge 12. The cutting 0d of the supply-pipe 11 and opening the discharge-pipe 12 will immediately cause the bell A to descend and force air into the bell G through the pipe 1. This descent of the bell will continue until the lug 30 engages the arm 33 operates the latch 32, and releases the lever 23, which drops and operates the lever 21 to close the discharge-pipe 12 and open the supply-pipe 11. The cycle will continue until the bell 0 becomes filled, when the arm 36 will be raised, the valve 35 closed,

and the air out off.

I do not wish to be limited as to details of construction, as these may be modified in many particulars without departing from the spirit of my invention.

Having thus described myinvention, what I claim as new, and Wish to secure by Letters Patent, is-- 1. The combination with the storage-bell and a pumping-bell connected by a pipe supplied with check-valves, of a motor-barrel having a piston therein connected to said pumping-bell, a valve constructed to regulate the flow of water into and out of said pumping-bell, a lever connected to operate said Valve, a pair of cam-bearing levers, one located on each side of said levers in position to engage and operate said lever, and means connecting said bell and said cam-bearing levers to operate said levers, substantially as described.

2. In a device of the class described, the combination with a bell mounted in a tub, of a motor-barrel provided with a piston connected to said bell, a pipe connected to said barrel, a valve mounted in said pipe, a lever arranged to operate said valve to regulate the How of water into and out of said barrel, a lever bearing a weight on one arm and a cam on the other, which cam is located to engage said lever, said weighted arm being connected to said hell by a flexible member, and a second lever bearing a weight on one arm and a cam on the other, said lever being located to operate said first-mentioned lever in the opposite direction from the first-mentioned cam-bearing lever, means for connecting said cam-bearing levers and said bell to operate them, substantially as described.

3. The combination with a pumping-bell, of a motor-barrel having a piston therein which is connected to said bell, a pipe connected to said motor-barrel and provided with a valve having a sliding stem, a lever connected to said stem, a first lever bearing a cam on one arm and a weight on the other, a chain connected to said bell and the weighted arm of said lever, a second lever bearing a cam on one arm and a weight on the other, a catch carried by said bell and located to engage the said second lever, said cam being located to operate said first-men tion ed lever to operate said valve, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EDWARD VVALTI-IER.

WVitnesses:

J. W. MORTON, H. STICHTER. 

